Brain Teasers: A brain teaser is a form of puzzle that requires thought to solve. It often requires thinking in unconventional ways with given constraints in mind; sometimes it also involves lateral thinking. Logic puzzles and riddles are specific types of brain teasers. Today's can be found below....

Last Valentine's Day, Jimmy and Shelly were looking for just the right card for each other.
Shelly adored the diamonds she got from Jimmy, and it was no surprise when he stole her heart away. Sadly, their grandmother brought an end to their affair...if only for a moment, for they had the perfect idea to let it go on for as long as they liked.
What were Jimmy and Shelly up to?